Many of the wordpress themes are having options in admin panel for uploading and changing the logo. But if we want to make a custom logo that is used in converting HTML to wordpress or for making any custom wordpress theme or we do not have any option in theme then we can create a custom logo for every custom wordpress site.

We can add custom logo by adding few lines of code in wordpress theme's header.php file and functions.php file.

In functions.php file , we can just copy this function
/**
 *  use custom logo.
 * Add logo in theme customize option.
 */
add_action( 'customize_register', 'wp1_customize_register' );
function wp1_customize_register($wp_customize) {
    $wp_customize-add_section( 'ignite_custom_logo', array(
        'title'                = 'Logo',
        'description'        = 'Display a custom logo?',
        'priority'            = 25,
    ) );
    $wp_customize-add_setting( 'custom_logo', array(
        'default'            = '',
    ) );
    $wp_customize-add_control( new WP_Customize_Image_Control( $wp_customize, 'custom_logo', array(
        'label'                = 'Custom logo',
        'section'            = 'ignite_custom_logo',
        'settings'            = 'custom_logo',
    ) ));
}

After adding the function in functions.php , we have to call the logo in the header.php file.

We can just add the below code in theme's header.php file for calling the logo.

<?php echo site_url(); ?"<img src="<?php echo get_theme_mod( 'custom_logo' ); ?

after calling the logo in header.php , we can easily change the logo from wordpress backend by going to appearance-customize.

Thanks